fs/nfs/callback.h

   1 /*
   2  * linux/fs/nfs/callback.h
   3  *
   4  * Copyright (C) 2004 Trond Myklebust
   5  *
   6  * NFSv4 callback definitions
   7  */
   8 #ifndef __LINUX_FS_NFS_CALLBACK_H
   9 #define __LINUX_FS_NFS_CALLBACK_H
  10
  11 #define NFS4_CALLBACK 0x40000000
  12 #define NFS4_CALLBACK_XDRSIZE 2048
  13 #define NFS4_CALLBACK_BUFSIZE (1024 + NFS4_CALLBACK_XDRSIZE)
  14
  15 enum nfs4_callback_procnum {
  16         CB_NULL = 0,
  17         CB_COMPOUND = 1,
  18 };
  19
  20 enum nfs4_callback_opnum {
  21         OP_CB_GETATTR = 3,
  22         OP_CB_RECALL  = 4,
  23         OP_CB_ILLEGAL = 10044,
  24 };
  25
  26 struct cb_compound_hdr_arg {
  27         int taglen;
  28         const char *tag;
  29         unsigned int callback_ident;
  30         unsigned nops;
  31 };
  32
  33 struct cb_compound_hdr_res {
  34         __be32 *status;
  35         int taglen;
  36         const char *tag;
  37         __be32 *nops;
  38 };
  39
  40 struct cb_getattrargs {
  41         struct sockaddr_in *addr;
  42         struct nfs_fh fh;
  43         uint32_t bitmap[2];
  44 };
  45
  46 struct cb_getattrres {
  47         __be32 status;
  48         uint32_t bitmap[2];
  49         uint64_t size;
  50         uint64_t change_attr;
  51         struct timespec ctime;
  52         struct timespec mtime;
  53 };
  54
  55 struct cb_recallargs {
  56         struct sockaddr_in *addr;
  57         struct nfs_fh fh;
  58         nfs4_stateid stateid;
  59         uint32_t truncate;
  60 };
  61
  62 extern __be32 nfs4_callback_getattr(struct cb_getattrargs *args, struct cb_getattrres *res);
  63 extern __be32 nfs4_callback_recall(struct cb_recallargs *args, void *dummy);
  64
  65 #ifdef CONFIG_NFS_V4
  66 extern int nfs_callback_up(void);
  67 extern void nfs_callback_down(void);
  68 #else
  69 #define nfs_callback_up()       (0)
  70 #define nfs_callback_down()     do {} while(0)
  71 #endif
  72
  73 extern unsigned int nfs_callback_set_tcpport;
  74 extern unsigned short nfs_callback_tcpport;
  75
  76 #endif /* __LINUX_FS_NFS_CALLBACK_H */